Slayground

{t}: Add 1 of any colour to your mana pool
{4}{t}: Choose any number of players and/or permanents that have counters on them, then
remove one of each kind of counter that are
already there on these players or permanents
Unlike the Arena, the Slaygrounds has a net like area,
just like the one in area 2 of Primal Forest. There is a Dragonator on the west edge of the arena